EP0112805A1 - Device to operate the movement of a draw carriage - Google Patents
Device to operate the movement of a draw carriage Download PDFInfo
- Publication number
- EP0112805A1 EP0112805A1 EP19830830275 EP83830275A EP0112805A1 EP 0112805 A1 EP0112805 A1 EP 0112805A1 EP 19830830275 EP19830830275 EP 19830830275 EP 83830275 A EP83830275 A EP 83830275A EP 0112805 A1 EP0112805 A1 EP 0112805A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carriage
- movement
- operate
- roller
- grippers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/06—Cam-followers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/27—Carriages; Drives
- B21C1/30—Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/08—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion
- F16H25/12—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion with reciprocation along the axis of rotation, e.g. gearings with helical grooves and automatic reversal or cams
Definitions
- This invention concerns a device to operate the movement of a draw carriage.
- the invention concerns a device to operate the carriage which bears the grippers that clamp the piece to be drawn, together with a drum that bears a control cam.
- the present invention therefore concerns a movement device to impart a reciprocating to-and-fro movement to the carriage which bears the grippers in draw machines, the device comprising at least one element to bear cams which is able to rotate with a closed circuit.
- the cams cooperate at least with a roller supported by the carriage so as to transmit the to-and-fro travel to the carriage.
- the device of this invention also has the purpose of simplifying the operations of opening and closing the grippers, which are able to engage the material to be drawn whenever the carriage moves forwards.
- a proposal in IT 730.874 which discloses a drum on which a cam is developed with a closed ring and protrudes with two surfaces lying substantially at right angles to the axis of the drum and positioned on the two sides of the protrusion. These surfaces have a discontinuous development with substantially parallel tracts and tracts which approach each other, this being made necessary by the geometry of the cam.
- US 3,374,684 is known and discloses a carriage with two rollers operated respectively by two cams which, as in the patent cited earlier, are made on opposed faces of a helicoidal projection on a rotatatble drum.
- This invention comprises two carriages which move in opposite directions and are operated by two coaxial cams. It entails the same shortcomings and drawbacks as IT 730.874 cited above.
- GB 829,519 is known and discloses three carriages having their movements lying at angles of 120° to each other. The purpose of this is to ensure a continuous grip on the material to be drawn, thus entailing the advantage of actually having two carriages always engaged with the material.
- the compensation carriage 14 is resisted resiliently by compensation spring means 15, which may possibly be guided on a suitable pin 115.
- the thrust roller 12 cooperates with a thrust guide path 16 comprised in a circular cam 18. In every radial position the thrust guide path 16 lies substantially at right angles to the axis 20 of the drum 19.
- the drum 19 having its axis 20 thus comprises a circular cam 18 which is closed over one full. revolution of the drum 19.
- This cam 18 has, in front of the thrust guide path 16, a resetting and compensation guide path 17, with which a resetting roller 13 cooperates.
- a plate 122 which supports the grippers 22 can cooperate with the plate 11 which bears the grippers 22 so as to obtain advantageous clamping action by the same 22.
- the carriage 10 which bears the grippers 22 has normal guide wheels 23-123, which cooperate with linear guides 121.
- two guide systems can cooperate on one and the same axis so that while one system is in a drawing condition, the other system is in a resetting condition, thus providing a continuity of drawing which otherwise would not be possible.
- Figs.5 and 6 show a possible embodiment to actuate the opening and closing of the grippers, or vice, 22 according to the invention.
- the grippers, or vice, 22 are fitted above the base 110 of the carriage 10 in a known manner and, by moving within wedge-shaped guides which are not shown here, provoke the clamping or unclamping of the piece to be drawn, such piepe to be drawn lying substantially along the drawing axis 34.
- the grippers 22 have jaws 222 of a replaceable type fitted to them so as to grip the piece to be drawn.
- a damped wedge-shaped means 29 is envisaged in cooperation with a shoulder 26 of the path 16 (but could also be present on the drum 19) and is able to swing on an oscillation pivot 28 and has a wedge-shaped form, as we said above.
- the form of the damped wedge-shaped means 29 is such that, during the coordinated forward movement of the gripper-bearing carriage 10 in relation to the thrust path 16, the presence of an actuation roller 35 cooperating with the grippers 22 causes an auxiliary sideways displacement of the grippers 22 towards their closure position.
- the position of the damped wedge-shaped means 29 in relation to the thrust path 16 is such as to actuate the actuation roller 35 in cooperation with the instantaneous moment at which the grippers 22 have to clamp the piece to be drawn.
- the damped wedge-shaped means 29 cooperates with a damper spring 30, which serves to cushion the impact of the actuation roller 35 and also serves to facilitate non-destructive clamping of the grippers 22 against the piece to be drawn.
- Fig.5 shows how the wedge 29 able to swing is lodged in a lateral path 27 provided in a shoulder 26 of the thrust path 16.
- Fig.5 the wedge 29 is shown in its position of maximum travel for its clamping action, whereas the actuation roller 35 is shown in its closure position and (with lines of dashes) in its position at the start of closure operations.
- two actuation rollers 35 can be provided and be positioned differently, each of them cooperating with a gripper 22, the two rollers 35 working in coordination either with one double damped wedge means 29 or with two damped wedge means 29.
- a path 127 is provided on the same shoulder 26 of the path 16.
- This path 127 governs the movement of a roller 135, which in its turn is solidly fixed to a slider means 37, which can slide lengthwise along the carriage 10 and, in this case, is connected from below to the grippers 22 in a known manner.
- this connection can be made with restrained joint means such as pins, projections, locking pins, etc.
- the path 127 comprises suitable raised portions to act on the roller 135, which is displaced towards the left in Fig.8.
- the timing embodied in the path 127 enables the instant of closure of the grippers 22 to be determined.
- the conformation of the path 127 enables the grippers 22 to be closed gently and in a non-destructive manner against the piece to be drawn.
- the grippers 22 cooperate slidably with lengthwise guide means 38 positioned at an angle to the draw axis 34 so as to create a wedging of the grippers 22 themselves between the guide means 38.
- Opener spring means 32 with guide pins 132 cooperate with the inertia of the grippers 22 so as to open the latter 22, as we said earlier.
- the spring means 32 also perform a cushioning action when the grippers 22 are being closed, so as to obtain a gentle engagement of the piece to be drawn.
- Figs.8 and 9 show actuator means 36 which drive gripper jaws 136 for initial engagement of the piece to be drawn at the beginning of draw operations.
- the variant shown also envisages adjustment means to take up the play and to set the initial opening of the grippers 22. Such adjustment is carried out by means of a threaded sleeve 42 through which the drawn material passes.
- the sleeve 42 is solidly fixed to the carriage 10 and is threaded outwardly.
- a ring nut 41 which is shown diagrammatically, cooperates with the threaded surface of the sleeve 42 and enables the movement of the slider 37 in relation to the sleeve 42 itself and therefore to the carriage 10 to be adjusted.
- the fitted jaws 222 can be removed from above in the embodiment shown after removal of clamp means 40 screwed onto the rear part of the grippers 22.
Abstract
Description
- This invention concerns a device to operate the movement of a draw carriage. To be more exact, the invention concerns a device to operate the carriage which bears the grippers that clamp the piece to be drawn, together with a drum that bears a control cam.
- Various systems to govern the reciprocating movement of the carriage that bears the grippers are known and are derived substantially from the cooperation of at least one cam-follower roller with a cam developed on a drum.
- In particular, reference is made here to a cam element developed over one single full revolution of the drum.
- The present invention therefore concerns a movement device to impart a reciprocating to-and-fro movement to the carriage which bears the grippers in draw machines, the device comprising at least one element to bear cams which is able to rotate with a closed circuit. The cams cooperate at least with a roller supported by the carriage so as to transmit the to-and-fro travel to the carriage.
- The device of this invention also has the purpose of simplifying the operations of opening and closing the grippers, which are able to engage the material to be drawn whenever the carriage moves forwards.
- Various known devices have the purpose of performing the operation of a draw carriage by means of cams on a rotatable drum.
- For instance, a proposal in IT 730.874 is known which discloses a drum on which a cam is developed with a closed ring and protrudes with two surfaces lying substantially at right angles to the axis of the drum and positioned on the two sides of the protrusion. These surfaces have a discontinuous development with substantially parallel tracts and tracts which approach each other, this being made necessary by the geometry of the cam.
- Although this system may be deemed advantageous for medium and low speeds, yet it entails noteworthy complications both during its embodiment and also when it is being installed and employed; moreover, it gives an unsatisfactory result when the gripper-bearing carriage has to be operated at high and medium speeds.
- In particular, it involves problems linked to the construction of the cams themselves owing to the varying development of the cam walls, the question of spare parts and supplies being problematical.
- US 3,374,684 is known and discloses a carriage with two rollers operated respectively by two cams which, as in the patent cited earlier, are made on opposed faces of a helicoidal projection on a rotatatble drum. This invention comprises two carriages which move in opposite directions and are operated by two coaxial cams. It entails the same shortcomings and drawbacks as IT 730.874 cited above.
- GB 829,519 is known and discloses three carriages having their movements lying at angles of 120° to each other. The purpose of this is to ensure a continuous grip on the material to be drawn, thus entailing the advantage of actually having two carriages always engaged with the material.
- However, this system involves the drawback that, when the about which a resetting
roller 13 can rotate. - The
compensation carriage 14 is resisted resiliently by compensation spring means 15, which may possibly be guided on asuitable pin 115. - The
thrust roller 12 cooperates with athrust guide path 16 comprised in acircular cam 18. In every radial position thethrust guide path 16 lies substantially at right angles to theaxis 20 of thedrum 19. - The
drum 19 having itsaxis 20 thus comprises acircular cam 18 which is closed over one full. revolution of thedrum 19. Thiscam 18 has, in front of thethrust guide path 16, a resetting andcompensation guide path 17, with which a resettingroller 13 cooperates. - A
plate 122 which supports thegrippers 22 can cooperate with theplate 11 which bears thegrippers 22 so as to obtain advantageous clamping action by the same 22. - The
carriage 10 which bears thegrippers 22 has normal guide wheels 23-123, which cooperate withlinear guides 121. - According to the invention two guide systems can cooperate on one and the same axis so that while one system is in a drawing condition, the other system is in a resetting condition, thus providing a continuity of drawing which otherwise would not be possible.
- Figs.5 and 6 show a possible embodiment to actuate the opening and closing of the grippers, or vice, 22 according to the invention.
- The grippers, or vice, 22 are fitted above the
base 110 of thecarriage 10 in a known manner and, by moving within wedge-shaped guides which are not shown here, provoke the clamping or unclamping of the piece to be drawn, such piepe to be drawn lying substantially along thedrawing axis 34. - The
grippers 22 havejaws 222 of a replaceable type fitted to them so as to grip the piece to be drawn. - A damped wedge-
shaped means 29 is envisaged in cooperation with ashoulder 26 of the path 16 (but could also be present on the drum 19) and is able to swing on anoscillation pivot 28 and has a wedge-shaped form, as we said above. - The form of the damped wedge-
shaped means 29 is such that, during the coordinated forward movement of the gripper-bearingcarriage 10 in relation to thethrust path 16, the presence of anactuation roller 35 cooperating with thegrippers 22 causes an auxiliary sideways displacement of thegrippers 22 towards their closure position. - The position of the damped wedge-shaped means 29 in relation to the
thrust path 16 is such as to actuate theactuation roller 35 in cooperation with the instantaneous moment at which thegrippers 22 have to clamp the piece to be drawn. - The damped wedge-shaped means 29 cooperates with a
damper spring 30, which serves to cushion the impact of theactuation roller 35 and also serves to facilitate non-destructive clamping of thegrippers 22 against the piece to be drawn. - Fig.5 shows how the
wedge 29 able to swing is lodged in alateral path 27 provided in ashoulder 26 of thethrust path 16. - In the embodiment of Fig.5 the
wedge 29 is shown in its position of maximum travel for its clamping action, whereas theactuation roller 35 is shown in its closure position and (with lines of dashes) in its position at the start of closure operations. - When the
carriage 10 reaches the end of its run for the active drawing of the piece to be drawn, the inertias involved and the cooperation of an opener spring means 32 (loaded during clamping action) cooperating with anopener shaft 33 cause thegrippers 22 to be thrust in a direction opposite tc the action exerted beforehand by thewedge 29. The opening of thegrippers 22 themselves is obtained in this way. - The mutual transmission of movements and the coordination of the movement of the
grippers 22 are obtained by suitable terminal drawing means 31, which transmit the movements from onegripper 22 to the other and create the necessary suitable cooperation. - If so required, two
actuation rollers 35 can be provided and be positioned differently, each of them cooperating with agripper 22, the tworollers 35 working in coordination either with one double damped wedge means 29 or with two damped wedge means 29. - According to a variant shown in Figs.7, 8 and 9 a
path 127 is provided on thesame shoulder 26 of thepath 16. Thispath 127 governs the movement of aroller 135, which in its turn is solidly fixed to a slider means 37, which can slide lengthwise along thecarriage 10 and, in this case, is connected from below to thegrippers 22 in a known manner. For instance, this connection can be made with restrained joint means such as pins, projections, locking pins, etc. - For the positive actuation of closure of the
grippers 22 thepath 127 comprises suitable raised portions to act on theroller 135, which is displaced towards the left in Fig.8. - In this way the
slider 27 too forces thegrippers 22 towards the left (see Fig.9) in their closure direction. - The timing embodied in the
path 127 enables the instant of closure of thegrippers 22 to be determined. - The conformation of the
path 127 enables thegrippers 22 to be closed gently and in a non-destructive manner against the piece to be drawn. - In the example of Fig.9 the
grippers 22 cooperate slidably with lengthwise guide means 38 positioned at an angle to thedraw axis 34 so as to create a wedging of thegrippers 22 themselves between the guide means 38. - Sliding of the
grippers 22 is facilitated by rollingmeans 39 such as rollers or balls. - Opener spring means 32 with guide pins 132 cooperate with the inertia of the
grippers 22 so as to open the latter 22, as we said earlier. The spring means 32 also perform a cushioning action when thegrippers 22 are being closed, so as to obtain a gentle engagement of the piece to be drawn. - Figs.8 and 9 show actuator means 36 which drive
gripper jaws 136 for initial engagement of the piece to be drawn at the beginning of draw operations. - After such engagement and when the
carriage 10 has been retracted for the first time, thejaws 136 are opened for the start of normal working. - The variant shown also envisages adjustment means to take up the play and to set the initial opening of the
grippers 22. Such adjustment is carried out by means of a threadedsleeve 42 through which the drawn material passes. Thesleeve 42 is solidly fixed to thecarriage 10 and is threaded outwardly. - A
ring nut 41, which is shown diagrammatically, cooperates with the threaded surface of thesleeve 42 and enables the movement of theslider 37 in relation to thesleeve 42 itself and therefore to thecarriage 10 to be adjusted. - The fitted jaws 222 (see Fig.9) can be removed from above in the embodiment shown after removal of clamp means 40 screwed onto the rear part of the
grippers 22. -
- 10 - gripper-bearing carriage
- 110 - base of carriage
- 11 - gripper-bearing plate
- 12 - thrust roller
- 13 - resetting roller
- 14 - compensation carriage
- 15 - compensation spring
- 115 - guide pin
- 16 - thrust path
- 17 - resetting and compensation path
- 18 - circular cam
- 19 - cam-bearing drum
- 20 - axis of drum
- 21 - guides for
carriage 14 - 121 - linear guides for
carriage 10 - 22 - grippers
- 122 - support plate
- 222 - fitted jaws
- 23 - guide wheels
- 123 - guide wheels
- 24 - pivot
- 25 - pivot
- 26 - shoulder of path
- 27 - lateral path
- 127 - lateral path
- 28 - oscillation pivot
- 29 - wedge able to swing
- 30 - damper spring
- 31 - terminal drawing means
- 32 - damper and opener spring
- 132 - guide pins
- 33 - opener shaft
- 34 - drawing and clamping axis
- 35 - actuation roller
- 135 - actuation roller
- 36 - actuator means
- 136 - gripper jaws
- 37 - control slider means
- 38 - lengthwise guides
- 39 - rolling means
- 40 - clamp means
- 41 - adjustment ring nut
- 42 - guide sleeve
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83830275T ATE29401T1 (en) | 1982-12-23 | 1983-12-21 | FEED DEVICE FOR A PULLING CARRIAGE. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8350582 | 1982-12-23 | ||
IT83505/82A IT1158631B (en) | 1982-12-23 | 1982-12-23 | Actuator for work draw carriage |
IT8350782 | 1982-12-23 | ||
IT83507/82A IT1158632B (en) | 1982-12-23 | 1982-12-23 | Actuator for work draw carriage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0112805A1 true EP0112805A1 (en) | 1984-07-04 |
EP0112805B1 EP0112805B1 (en) | 1987-09-09 |
Family
ID=26330092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19830830275 Expired EP0112805B1 (en) | 1982-12-23 | 1983-12-21 | Device to operate the movement of a draw carriage |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0112805B1 (en) |
DE (1) | DE3373424D1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2168124A (en) * | 1984-11-30 | 1986-06-11 | Pilkington Perkin Elmer Ltd | Improvements in or relating to cam mechanisms |
DE3644560C1 (en) * | 1986-12-27 | 1988-06-09 | Kieserling Ziehmaschinen | Sledge drive for a drawing machine |
EP0371165A1 (en) * | 1988-11-30 | 1990-06-06 | Schumag Aktiengesellschaft | Motion drive |
US5603245A (en) * | 1993-02-02 | 1997-02-18 | Schumag Aktiengesellschaft | Method for a translatory motion of components |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080155841A1 (en) * | 2006-12-29 | 2008-07-03 | Po-Lin Ho | Drawing machine |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE295282C (en) * | ||||
DE701367C (en) * | 1938-05-04 | 1941-01-15 | Mannesmann Ag | Pull trolley for draw bars |
GB829519A (en) * | 1957-03-30 | 1960-03-02 | Schumag Schumacher Metallwerke | Devices for operating the draw carriages of drawing machines |
US3374684A (en) * | 1965-04-17 | 1968-03-26 | Schumag Schumacher Metallwerke | Carriage-reciprocating structure for a machine such as a drawing machine |
GB1112917A (en) * | 1964-11-13 | 1968-05-08 | Roannais Constr Textiles | Cam and roller device |
DE2322279B1 (en) * | 1973-05-03 | 1974-05-30 | Schumag Schumacher Metallwerke Gmbh, 5100 Aachen | Method and device for controlling with increased accuracy a different machine, in particular a slide drawing machine, and the slide machine itself |
FR2349376A1 (en) * | 1976-04-29 | 1977-11-25 | Meyer Roth Pastor Maschf | MACHINE FOR MANUFACTURING PROFILED PARTS FROM WIRE OR TAPE |
DE2806380B2 (en) * | 1978-02-13 | 1980-03-06 | Mannesmann Ag, 4000 Duesseldorf | Slide drawing machine |
-
1983
- 1983-12-21 EP EP19830830275 patent/EP0112805B1/en not_active Expired
- 1983-12-21 DE DE8383830275T patent/DE3373424D1/en not_active Expired
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE295282C (en) * | ||||
DE701367C (en) * | 1938-05-04 | 1941-01-15 | Mannesmann Ag | Pull trolley for draw bars |
GB829519A (en) * | 1957-03-30 | 1960-03-02 | Schumag Schumacher Metallwerke | Devices for operating the draw carriages of drawing machines |
GB1112917A (en) * | 1964-11-13 | 1968-05-08 | Roannais Constr Textiles | Cam and roller device |
US3374684A (en) * | 1965-04-17 | 1968-03-26 | Schumag Schumacher Metallwerke | Carriage-reciprocating structure for a machine such as a drawing machine |
DE2322279B1 (en) * | 1973-05-03 | 1974-05-30 | Schumag Schumacher Metallwerke Gmbh, 5100 Aachen | Method and device for controlling with increased accuracy a different machine, in particular a slide drawing machine, and the slide machine itself |
FR2349376A1 (en) * | 1976-04-29 | 1977-11-25 | Meyer Roth Pastor Maschf | MACHINE FOR MANUFACTURING PROFILED PARTS FROM WIRE OR TAPE |
DE2806380B2 (en) * | 1978-02-13 | 1980-03-06 | Mannesmann Ag, 4000 Duesseldorf | Slide drawing machine |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2168124A (en) * | 1984-11-30 | 1986-06-11 | Pilkington Perkin Elmer Ltd | Improvements in or relating to cam mechanisms |
US4688902A (en) * | 1984-11-30 | 1987-08-25 | Pilkington P.E. Limited | Anti-backlash cam |
GB2168124B (en) * | 1984-11-30 | 1989-06-07 | Pilkington Perkin Elmer Ltd | Improvements in or relating to cam mechanisms |
DE3644560C1 (en) * | 1986-12-27 | 1988-06-09 | Kieserling Ziehmaschinen | Sledge drive for a drawing machine |
EP0371165A1 (en) * | 1988-11-30 | 1990-06-06 | Schumag Aktiengesellschaft | Motion drive |
US5603245A (en) * | 1993-02-02 | 1997-02-18 | Schumag Aktiengesellschaft | Method for a translatory motion of components |
Also Published As
Publication number | Publication date |
---|---|
EP0112805B1 (en) | 1987-09-09 |
DE3373424D1 (en) | 1987-10-15 |
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